Just take a moment and suppose that there may be better ways to deal with an unwanted sexual advance than shooting someone in the head.
Each and every day, millions of people take a moment to think of a better way to deal with sexual advances than murder.
And while most just take a moment to think about it and come to a rational solution, others have to think about it for 21 years.
“rational solution”
The rational solution would be for the pervert to not make the unwanted sexual advances. Then a gain. Such a simple solution goes over the heads of a pervert.